private void OnElementItemDragging(object sender, ElementItemDraggingEventArgs e)
{
e.Handled = true;
RaiseEvent(new ElementItemDraggingEventArgs(ElementItemDraggingEvent, e.OriginalSource, e.HorizontalChange, e.VerticalChange, e.PositionX, e.PositionY));
}
// This method raises the DragStart event
void RaiseDraggingEvent(ElementItem elementItem, double deltaX, double deltaY, double positionX, double positionY)
{
ElementItemDraggingEventArgs newEventArgs = new ElementItemDraggingEventArgs(ElementItem.DraggingEvent, elementItem, deltaX, deltaY, positionX, positionY);
RaiseEvent(newEventArgs);
}